/* pngset.c - storage of image information into info struct
 *
 * Last changed in libpng 1.4.1 [February 25, 2010]
 * Copyright (c) 1998-2010 Glenn Randers-Pehrson
 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
 * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
 *
 * This code is released under the libpng license.
 * For conditions of distribution and use, see the disclaimer
 * and license in png.h
 *
 * The functions here are used during reads to store data from the file
 * into the info struct, and during writes to store application data
 * into the info struct for writing into the file.  This abstracts the
 * info struct and allows us to change the structure in the future.
 */

#include "png.h"
#define PNG_NO_PEDANTIC_WARNINGS
#if defined (PNG_READ_SUPPORTED) || defined (PNG_WRITE_SUPPORTED)
    #include "pngpriv.h"

    #ifdef PNG_bKGD_SUPPORTED
void PNGAPI
png_set_bKGD(png_structp png_ptr, png_infop info_ptr, png_color_16p background)
{
    png_debug1(1, "in %s storage function", "bKGD");

    if (png_ptr == NULL || info_ptr == NULL)
        return;

    png_memcpy(&(info_ptr->background), background, png_sizeof(png_color_16));
    info_ptr->valid |= PNG_INFO_bKGD;
}
    #endif

    #ifdef PNG_cHRM_SUPPORTED
        #ifdef PNG_FLOATING_POINT_SUPPORTED
void PNGAPI
png_set_cHRM(png_structp png_ptr, png_infop info_ptr,
             double white_x, double white_y, double red_x, double red_y,
             double green_x, double green_y, double blue_x, double blue_y)
{
    png_debug1(1, "in %s storage function", "cHRM");

    if (png_ptr == NULL || info_ptr == NULL)
        return;

    info_ptr->x_white = (float)white_x;
    info_ptr->y_white = (float)white_y;
    info_ptr->x_red = (float)red_x;
    info_ptr->y_red = (float)red_y;
    info_ptr->x_green = (float)green_x;
    info_ptr->y_green = (float)green_y;
    info_ptr->x_blue = (float)blue_x;
    info_ptr->y_blue = (float)blue_y;
    #ifdef PNG_FIXED_POINT_SUPPORTED
    info_ptr->int_x_white = (png_fixed_point)(white_x * 100000. + 0.5);
    info_ptr->int_y_white = (png_fixed_point)(white_y * 100000. + 0.5);
    info_ptr->int_x_red = (png_fixed_point)(red_x * 100000. + 0.5);
    info_ptr->int_y_red = (png_fixed_point)(red_y * 100000. + 0.5);
    info_ptr->int_x_green = (png_fixed_point)(green_x * 100000. + 0.5);
    info_ptr->int_y_green = (png_fixed_point)(green_y * 100000. + 0.5);
    info_ptr->int_x_blue = (png_fixed_point)(blue_x * 100000. + 0.5);
    info_ptr->int_y_blue = (png_fixed_point)(blue_y * 100000. + 0.5);
    #endif
    info_ptr->valid |= PNG_INFO_cHRM;
}
        #endif /* PNG_FLOATING_POINT_SUPPORTED */

        #ifdef PNG_FIXED_POINT_SUPPORTED
void PNGAPI
png_set_cHRM_fixed(png_structp png_ptr, png_infop info_ptr,
                   png_fixed_point white_x, png_fixed_point white_y, png_fixed_point red_x,
                   png_fixed_point red_y, png_fixed_point green_x, png_fixed_point green_y,
                   png_fixed_point blue_x, png_fixed_point blue_y)
{
    png_debug1(1, "in %s storage function", "cHRM fixed");

    if (png_ptr == NULL || info_ptr == NULL)
        return;

    #ifdef PNG_CHECK_cHRM_SUPPORTED
    if (png_check_cHRM_fixed(png_ptr,
                             white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y))
    #endif
    {
        info_ptr->int_x_white = white_x;
        info_ptr->int_y_white = white_y;
        info_ptr->int_x_red = red_x;
        info_ptr->int_y_red = red_y;
        info_ptr->int_x_green = green_x;
        info_ptr->int_y_green = green_y;
        info_ptr->int_x_blue = blue_x;
        info_ptr->int_y_blue = blue_y;
        #ifdef  PNG_FLOATING_POINT_SUPPORTED
        info_ptr->x_white = (float)(white_x / 100000.);
        info_ptr->y_white = (float)(white_y / 100000.);
        info_ptr->x_red = (float)(red_x / 100000.);
        info_ptr->y_red = (float)(red_y / 100000.);
        info_ptr->x_green = (float)(green_x / 100000.);
        info_ptr->y_green = (float)(green_y / 100000.);
        info_ptr->x_blue = (float)(blue_x / 100000.);
        info_ptr->y_blue = (float)(blue_y / 100000.);
        #endif
        info_ptr->valid |= PNG_INFO_cHRM;
    }
}
        #endif /* PNG_FIXED_POINT_SUPPORTED */
    #endif /* PNG_cHRM_SUPPORTED */

    #ifdef PNG_gAMA_SUPPORTED
        #ifdef PNG_FLOATING_POINT_SUPPORTED
void PNGAPI
png_set_gAMA(png_structp png_ptr, png_infop info_ptr, double file_gamma)
{
    double png_gamma;

    png_debug1(1, "in %s storage function", "gAMA");

    if (png_ptr == NULL || info_ptr == NULL)
        return;

    /* Check for overflow */
    if (file_gamma > 21474.83)
    {
        png_warning(png_ptr, "Limiting gamma to 21474.83");
        png_gamma = 21474.83;
    }
    else
        png_gamma = file_gamma;
    info_ptr->gamma = (float)png_gamma;
    #ifdef PNG_FIXED_POINT_SUPPORTED
    info_ptr->int_gamma = (int)(png_gamma * 100000. + .5);
    #endif
    info_ptr->valid |= PNG_INFO_gAMA;
    if (png_gamma == 0.0)
        png_warning(png_ptr, "Setting gamma=0");
}
        #endif
void PNGAPI
png_set_gAMA_fixed(png_structp png_ptr, png_infop info_ptr, png_fixed_point
                   int_gamma)
{
    png_fixed_point png_gamma;

    png_debug1(1, "in %s storage function", "gAMA");

    if (png_ptr == NULL || info_ptr == NULL)
        return;

    if (int_gamma > (png_fixed_point)PNG_UINT_31_MAX)
    {
        png_warning(png_ptr, "Limiting gamma to 21474.83");
        png_gamma = PNG_UINT_31_MAX;
    }
    else
    {
        if (int_gamma < 0)
        {
            png_warning(png_ptr, "Setting negative gamma to zero");
            png_gamma = 0;
        }
        else
            png_gamma = int_gamma;
    }
    #ifdef PNG_FLOATING_POINT_SUPPORTED
    info_ptr->gamma = (float)(png_gamma / 100000.);
    #endif
    #ifdef PNG_FIXED_POINT_SUPPORTED
    info_ptr->int_gamma = png_gamma;
    #endif
    info_ptr->valid |= PNG_INFO_gAMA;
    if (png_gamma == 0)
        png_warning(png_ptr, "Setting gamma=0");
}
    #endif

    #ifdef PNG_hIST_SUPPORTED
void PNGAPI
png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p hist)
{
    int i;

    png_debug1(1, "in %s storage function", "hIST");

    if (png_ptr == NULL || info_ptr == NULL)
        return;

    if (info_ptr->num_palette == 0 || info_ptr->num_palette
        > PNG_MAX_PALETTE_LENGTH)
    {
        png_warning(png_ptr,
                    "Invalid palette size, hIST allocation skipped");
        return;
    }

    png_free_data(png_ptr, info_ptr, PNG_FREE_HIST, 0);
    /* Changed from info->num_palette to PNG_MAX_PALETTE_LENGTH in
     * version 1.2.1
     */
    png_ptr->hist = (png_uint_16p)png_malloc_warn(png_ptr,
                                                  PNG_MAX_PALETTE_LENGTH * png_sizeof(png_uint_16));
    if (png_ptr->hist == NULL)
    {
        png_warning(png_ptr, "Insufficient memory for hIST chunk data");
        return;
    }

    for (i = 0; i < info_ptr->num_palette; i++)
        png_ptr->hist[i] = hist[i];
    info_ptr->hist = png_ptr->hist;
    info_ptr->valid |= PNG_INFO_hIST;

    info_ptr->free_me |= PNG_FREE_HIST;
}
    #endif

void PNGAPI
png_set_IHDR(png_structp png_ptr, png_infop info_ptr,
             png_uint_32 width, png_uint_32 height, int bit_depth,
             int color_type, int interlace_type, int compression_type,
             int filter_type)
{
    png_debug1(1, "in %s storage function", "IHDR");

    if (png_ptr == NULL || info_ptr == NULL)
        return;

    info_ptr->width = width;
    info_ptr->height = height;
    info_ptr->bit_depth = (png_byte)bit_depth;
    info_ptr->color_type = (png_byte)color_type;
    info_ptr->compression_type = (png_byte)compression_type;
    info_ptr->filter_type = (png_byte)filter_type;
    info_ptr->interlace_type = (png_byte)interlace_type;

    png_check_IHDR(png_ptr, info_ptr->width, info_ptr->height,
                   info_ptr->bit_depth, info_ptr->color_type, info_ptr->interlace_type,
                   info_ptr->compression_type, info_ptr->filter_type);

    if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
        info_ptr->channels = 1;
    else if (info_ptr->color_type & PNG_COLOR_MASK_COLOR)
        info_ptr->channels = 3;
    else
        info_ptr->channels = 1;
    if (info_ptr->color_type & PNG_COLOR_MASK_ALPHA)
        info_ptr->channels++;
    info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth);

    /* Check for potential overflow */
    if (width > (PNG_UINT_32_MAX
                 >> 3)      /* 8-byte RGBA pixels */
        - 64                /* bigrowbuf hack */
        - 1                 /* filter byte */
        - 7 * 8             /* rounding of width to multiple of 8 pixels */
        - 8)                /* extra max_pixel_depth pad */
        info_ptr->rowbytes = 0;
    else
        info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth, width);
}

    #ifdef PNG_oFFs_SUPPORTED
void PNGAPI
png_set_oFFs(png_structp png_ptr, png_infop info_ptr,
             png_int_32 offset_x, png_int_32 offset_y, int unit_type)
{
    png_debug1(1, "in %s storage function", "oFFs");

    if (png_ptr == NULL || info_ptr == NULL)
        return;

    info_ptr->x_offset = offset_x;
    info_ptr->y_offset = offset_y;
    info_ptr->offset_unit_type = (png_byte)unit_type;
    info_ptr->valid |= PNG_INFO_oFFs;
}
    #endif

    #ifdef PNG_pCAL_SUPPORTED
void PNGAPI
png_set_pCAL(png_structp png_ptr, png_infop info_ptr,
             png_charp purpose, png_int_32 X0, png_int_32 X1, int type, int nparams,
             png_charp units, png_charpp params)
{
    png_size_t length;
    int i;

    png_debug1(1, "in %s storage function", "pCAL");

    if (png_ptr == NULL || info_ptr == NULL)
        return;

    length = png_strlen(purpose) + 1;
    png_debug1(3, "allocating purpose for info (%lu bytes)",
               (unsigned long)length);
    info_ptr->pcal_purpose = (png_charp)png_malloc_warn(png_ptr, length);
    if (info_ptr->pcal_purpose == NULL)
    {
        png_warning(png_ptr, "Insufficient memory for pCAL purpose");
        return;
    }
    png_memcpy(info_ptr->pcal_purpose, purpose, length);

    png_debug(3, "storing X0, X1, type, and nparams in info");
    info_ptr->pcal_X0 = X0;
    info_ptr->pcal_X1 = X1;
    info_ptr->pcal_type = (png_byte)type;
    info_ptr->pcal_nparams = (png_byte)nparams;

    length = png_strlen(units) + 1;
    png_debug1(3, "allocating units for info (%lu bytes)",
               (unsigned long)length);
    info_ptr->pcal_units = (png_charp)png_malloc_warn(png_ptr, length);
    if (info_ptr->pcal_units == NULL)
    {
        png_warning(png_ptr, "Insufficient memory for pCAL units");
        return;
    }
    png_memcpy(info_ptr->pcal_units, units, length);

    info_ptr->pcal_params = (png_charpp)png_malloc_warn(png_ptr,
                                                        (png_size_t)((nparams + 1) * png_sizeof(png_charp)));
    if (info_ptr->pcal_params == NULL)
    {
        png_warning(png_ptr, "Insufficient memory for pCAL params");
        return;
    }

    png_memset(info_ptr->pcal_params, 0, (nparams + 1) * png_sizeof(png_charp));

    for (i = 0; i < nparams; i++)
    {
        length = png_strlen(params[i]) + 1;
        png_debug2(3, "allocating parameter %d for info (%lu bytes)", i,
                   (unsigned long)length);
        info_ptr->pcal_params[i] = (png_charp)png_malloc_warn(png_ptr, length);
        if (info_ptr->pcal_params[i] == NULL)
        {
            png_warning(png_ptr, "Insufficient memory for pCAL parameter");
            return;
        }
        png_memcpy(info_ptr->pcal_params[i], params[i], length);
    }

    info_ptr->valid |= PNG_INFO_pCAL;
    info_ptr->free_me |= PNG_FREE_PCAL;
}
    #endif

    #if defined (PNG_READ_sCAL_SUPPORTED) || defined (PNG_WRITE_sCAL_SUPPORTED)
        #ifdef PNG_FLOATING_POINT_SUPPORTED
void PNGAPI
png_set_sCAL(png_structp png_ptr, png_infop info_ptr,
             int unit, double width, double height)
{
    png_debug1(1, "in %s storage function", "sCAL");

    if (png_ptr == NULL || info_ptr == NULL)
        return;

    info_ptr->scal_unit = (png_byte)unit;
    info_ptr->scal_pixel_width = width;
    info_ptr->scal_pixel_height = height;

    info_ptr->valid |= PNG_INFO_sCAL;
}
        #else
            #ifdef PNG_FIXED_POINT_SUPPORTED
void PNGAPI
png_set_sCAL_s(png_structp png_ptr, png_infop info_ptr,
               int unit, png_charp swidth, png_charp sheight)
{
    png_size_t length;

    png_debug1(1, "in %s storage function", "sCAL");

    if (png_ptr == NULL || info_ptr == NULL)
        return;

    info_ptr->scal_unit = (png_byte)unit;

    length = png_strlen(swidth) + 1;
    png_debug1(3, "allocating unit for info (%u bytes)",
               (unsigned int)length);
    info_ptr->scal_s_width = (png_charp)png_malloc_warn(png_ptr, length);
    if (info_ptr->scal_s_width == NULL)
    {
        png_warning(png_ptr,
                    "Memory allocation failed while processing sCAL");
        return;
    }
    png_memcpy(info_ptr->scal_s_width, swidth, length);

    length = png_strlen(sheight) + 1;
    png_debug1(3, "allocating unit for info (%u bytes)",
               (unsigned int)length);
    info_ptr->scal_s_height = (png_charp)png_malloc_warn(png_ptr, length);
    if (info_ptr->scal_s_height == NULL)
    {
        png_free(png_ptr, info_ptr->scal_s_width);
        info_ptr->scal_s_width = NULL;
        png_warning(png_ptr,
                    "Memory allocation failed while processing sCAL");
        return;
    }
    png_memcpy(info_ptr->scal_s_height, sheight, length);
    info_ptr->valid |= PNG_INFO_sCAL;
    info_ptr->free_me |= PNG_FREE_SCAL;
}
            #endif
        #endif
    #endif

    #ifdef PNG_pHYs_SUPPORTED
void PNGAPI
png_set_pHYs(png_structp png_ptr, png_infop info_ptr,
             png_uint_32 res_x, png_uint_32 res_y, int unit_type)
{
    png_debug1(1, "in %s storage function", "pHYs");

    if (png_ptr == NULL || info_ptr == NULL)
        return;

    info_ptr->x_pixels_per_unit = res_x;
    info_ptr->y_pixels_per_unit = res_y;
    info_ptr->phys_unit_type = (png_byte)unit_type;
    info_ptr->valid |= PNG_INFO_pHYs;
}
    #endif

void PNGAPI
png_set_PLTE(png_structp png_ptr, png_infop info_ptr,
             png_colorp palette, int num_palette)
{

    png_debug1(1, "in %s storage function", "PLTE");

    if (png_ptr == NULL || info_ptr == NULL)
        return;

    if (num_palette < 0 || num_palette > PNG_MAX_PALETTE_LENGTH)
    {
        if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
            png_error(png_ptr, "Invalid palette length");
        else
        {
            png_warning(png_ptr, "Invalid palette length");
            return;
        }
    }

    /* It may not actually be necessary to set png_ptr->palette here;
     * we do it for backward compatibility with the way the png_handle_tRNS
     * function used to do the allocation.
     */
    png_free_data(png_ptr, info_ptr, PNG_FREE_PLTE, 0);

    /* Changed in libpng-1.2.1 to allocate PNG_MAX_PALETTE_LENGTH instead
     * of num_palette entries, in case of an invalid PNG file that has
     * too-large sample values.
     */
    png_ptr->palette = (png_colorp)png_calloc(png_ptr,
                                              PNG_MAX_PALETTE_LENGTH * png_sizeof(png_color));
    png_memcpy(png_ptr->palette, palette, num_palette * png_sizeof(png_color));
    info_ptr->palette = png_ptr->palette;
    info_ptr->num_palette = png_ptr->num_palette = (png_uint_16)num_palette;

    info_ptr->free_me |= PNG_FREE_PLTE;

    info_ptr->valid |= PNG_INFO_PLTE;
}

    #ifdef PNG_sBIT_SUPPORTED
void PNGAPI
png_set_sBIT(png_structp png_ptr, png_infop info_ptr,
             png_color_8p sig_bit)
{
    png_debug1(1, "in %s storage function", "sBIT");

    if (png_ptr == NULL || info_ptr == NULL)
        return;

    png_memcpy(&(info_ptr->sig_bit), sig_bit, png_sizeof(png_color_8));
    info_ptr->valid |= PNG_INFO_sBIT;
}
    #endif

    #ifdef PNG_sRGB_SUPPORTED
void PNGAPI
png_set_sRGB(png_structp png_ptr, png_infop info_ptr, int intent)
{
    png_debug1(1, "in %s storage function", "sRGB");

    if (png_ptr == NULL || info_ptr == NULL)
        return;

    info_ptr->srgb_intent = (png_byte)intent;
    info_ptr->valid |= PNG_INFO_sRGB;
}

void PNGAPI
png_set_sRGB_gAMA_and_cHRM(png_structp png_ptr, png_infop info_ptr,
                           int intent)
{
    #ifdef PNG_gAMA_SUPPORTED
    #ifdef PNG_FLOATING_POINT_SUPPORTED
    float file_gamma;
    #endif
    #ifdef PNG_FIXED_POINT_SUPPORTED
    png_fixed_point int_file_gamma;
    #endif
    #endif
    #ifdef PNG_cHRM_SUPPORTED
    #ifdef PNG_FLOATING_POINT_SUPPORTED
    float white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y;
    #endif
    png_fixed_point int_white_x, int_white_y, int_red_x, int_red_y, int_green_x,
                    int_green_y, int_blue_x, int_blue_y;
    #endif
    png_debug1(1, "in %s storage function", "sRGB_gAMA_and_cHRM");

    if (png_ptr == NULL || info_ptr == NULL)
        return;

    png_set_sRGB(png_ptr, info_ptr, intent);

    #ifdef PNG_gAMA_SUPPORTED
    #ifdef PNG_FLOATING_POINT_SUPPORTED
    file_gamma = (float).45455;
    png_set_gAMA(png_ptr, info_ptr, file_gamma);
    #endif
    #ifdef PNG_FIXED_POINT_SUPPORTED
    int_file_gamma = 45455L;
    png_set_gAMA_fixed(png_ptr, info_ptr, int_file_gamma);
    #endif
    #endif

    #ifdef PNG_cHRM_SUPPORTED
    int_white_x = 31270L;
    int_white_y = 32900L;
    int_red_x = 64000L;
    int_red_y = 33000L;
    int_green_x = 30000L;
    int_green_y = 60000L;
    int_blue_x = 15000L;
    int_blue_y = 6000L;

    #ifdef PNG_FLOATING_POINT_SUPPORTED
    white_x = (float).3127;
    white_y = (float).3290;
    red_x = (float).64;
    red_y = (float).33;
    green_x = (float).30;
    green_y = (float).60;
    blue_x = (float).15;
    blue_y = (float).06;
    #endif

    #ifdef PNG_FIXED_POINT_SUPPORTED
    png_set_cHRM_fixed(png_ptr, info_ptr,
                       int_white_x, int_white_y, int_red_x, int_red_y, int_green_x,
                       int_green_y, int_blue_x, int_blue_y);
    #endif
    #ifdef PNG_FLOATING_POINT_SUPPORTED
    png_set_cHRM(png_ptr, info_ptr,
                 white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y);
    #endif
    #endif /* cHRM */
}
    #endif /* sRGB */


    #ifdef PNG_iCCP_SUPPORTED
void PNGAPI
png_set_iCCP(png_structp png_ptr, png_infop info_ptr,
             png_charp name, int compression_type,
             png_charp profile, png_uint_32 proflen)
{
    png_charp new_iccp_name;
    png_charp new_iccp_profile;
    png_uint_32 length;

    png_debug1(1, "in %s storage function", "iCCP");

    if (png_ptr == NULL || info_ptr == NULL || name == NULL || profile == NULL)
        return;

    length = png_strlen(name) + 1;
    new_iccp_name = (png_charp)png_malloc_warn(png_ptr, length);
    if (new_iccp_name == NULL)
    {
        png_warning(png_ptr, "Insufficient memory to process iCCP chunk");
        return;
    }
    png_memcpy(new_iccp_name, name, length);
    new_iccp_profile = (png_charp)png_malloc_warn(png_ptr, proflen);
    if (new_iccp_profile == NULL)
    {
        png_free(png_ptr, new_iccp_name);
        png_warning(png_ptr,
                    "Insufficient memory to process iCCP profile");
        return;
    }
    png_memcpy(new_iccp_profile, profile, (png_size_t)proflen);

    png_free_data(png_ptr, info_ptr, PNG_FREE_ICCP, 0);

    info_ptr->iccp_proflen = proflen;
    info_ptr->iccp_name = new_iccp_name;
    info_ptr->iccp_profile = new_iccp_profile;
    /* Compression is always zero but is here so the API and info structure
     * does not have to change if we introduce multiple compression types
     */
    info_ptr->iccp_compression = (png_byte)compression_type;
    info_ptr->free_me |= PNG_FREE_ICCP;
    info_ptr->valid |= PNG_INFO_iCCP;
}
    #endif

    #ifdef PNG_TEXT_SUPPORTED
void PNGAPI
png_set_text(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
             int num_text)
{
    int ret;
    ret = png_set_text_2(png_ptr, info_ptr, text_ptr, num_text);
    if (ret)
        png_error(png_ptr, "Insufficient memory to store text");
}

int /* PRIVATE */
png_set_text_2(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
               int num_text)
{
    int i;

    png_debug1(1, "in %s storage function", ((png_ptr == NULL ||
                                              png_ptr->chunk_name[0] == '\0') ?
                                             "text" : (png_const_charp)png_ptr->chunk_name));

    if (png_ptr == NULL || info_ptr == NULL || num_text == 0)
        return (0);

    /* Make sure we have enough space in the "text" array in info_struct
     * to hold all of the incoming text_ptr objects.
     */
    if (info_ptr->num_text + num_text > info_ptr->max_text)
    {
        if (info_ptr->text != NULL)
        {
            png_textp old_text;
            int old_max;

            old_max = info_ptr->max_text;
            info_ptr->max_text = info_ptr->num_text + num_text + 8;
            old_text = info_ptr->text;
            info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
                                                        (png_size_t)(info_ptr->max_text * png_sizeof(png_text)));
            if (info_ptr->text == NULL)
            {
                png_free(png_ptr, old_text);
                return (1);
            }
            png_memcpy(info_ptr->text, old_text, (png_size_t)(old_max *
                                                              png_sizeof(png_text)));
            png_free(png_ptr, old_text);
        }
        else
        {
            info_ptr->max_text = num_text + 8;
            info_ptr->num_text = 0;
            info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
                                                        (png_size_t)(info_ptr->max_text * png_sizeof(png_text)));
            if (info_ptr->text == NULL)
                return (1);
            info_ptr->free_me |= PNG_FREE_TEXT;
        }
        png_debug1(3, "allocated %d entries for info_ptr->text",
                   info_ptr->max_text);
    }
    for (i = 0; i < num_text; i++)
    {
        png_size_t text_length, key_len;
        png_size_t lang_len, lang_key_len;
        png_textp textp = &(info_ptr->text[info_ptr->num_text]);

        if (text_ptr[i].key == NULL)
            continue;

        key_len = png_strlen(text_ptr[i].key);

        if (text_ptr[i].compression <= 0)
        {
            lang_len = 0;
            lang_key_len = 0;
        }

        else
        #ifdef PNG_iTXt_SUPPORTED
        {
            /* Set iTXt data */

            if (text_ptr[i].lang != NULL)
                lang_len = png_strlen(text_ptr[i].lang);
            else
                lang_len = 0;
            if (text_ptr[i].lang_key != NULL)
                lang_key_len = png_strlen(text_ptr[i].lang_key);
            else
                lang_key_len = 0;
        }
        #else /* PNG_iTXt_SUPPORTED */
        {
            png_warning(png_ptr, "iTXt chunk not supported");
            continue;
        }
        #endif

        if (text_ptr[i].text == NULL || text_ptr[i].text[0] == '\0')
        {
            text_length = 0;
            #ifdef PNG_iTXt_SUPPORTED
            if (text_ptr[i].compression > 0)
                textp->compression = PNG_ITXT_COMPRESSION_NONE;
            else
            #endif
            textp->compression = PNG_TEXT_COMPRESSION_NONE;
        }

        else
        {
            text_length = png_strlen(text_ptr[i].text);
            textp->compression = text_ptr[i].compression;
        }

        textp->key = (png_charp)png_malloc_warn(png_ptr,
                                                (png_size_t)
                                                (key_len + text_length + lang_len + lang_key_len + 4));
        if (textp->key == NULL)
            return (1);
        png_debug2(2, "Allocated %lu bytes at %x in png_set_text",
                   (unsigned long)(png_uint_32)
                   (key_len + lang_len + lang_key_len + text_length + 4),
                   (int)textp->key);

        png_memcpy(textp->key, text_ptr[i].key, (png_size_t)(key_len));
        *(textp->key + key_len) = '\0';
        #ifdef PNG_iTXt_SUPPORTED
        if (text_ptr[i].compression > 0)
        {
            textp->lang = textp->key + key_len + 1;
            png_memcpy(textp->lang, text_ptr[i].lang, lang_len);
            *(textp->lang + lang_len) = '\0';
            textp->lang_key = textp->lang + lang_len + 1;
            png_memcpy(textp->lang_key, text_ptr[i].lang_key, lang_key_len);
            *(textp->lang_key + lang_key_len) = '\0';
            textp->text = textp->lang_key + lang_key_len + 1;
        }
        else
        #endif
        {
            #ifdef PNG_iTXt_SUPPORTED
            textp->lang = NULL;
            textp->lang_key = NULL;
            #endif
            textp->text = textp->key + key_len + 1;
        }
        if (text_length)
            png_memcpy(textp->text, text_ptr[i].text,
                       (png_size_t)(text_length));
        *(textp->text + text_length) = '\0';

        #ifdef PNG_iTXt_SUPPORTED
        if (textp->compression > 0)
        {
            textp->text_length = 0;
            textp->itxt_length = text_length;
        }
        else
        #endif

        {
            textp->text_length = text_length;
            #ifdef PNG_iTXt_SUPPORTED
            textp->itxt_length = 0;
            #endif
        }
        info_ptr->num_text++;
        png_debug1(3, "transferred text chunk %d", info_ptr->num_text);
    }
    return (0);
}
    #endif

    #ifdef PNG_tIME_SUPPORTED
void PNGAPI
png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_timep mod_time)
{
    png_debug1(1, "in %s storage function", "tIME");

    if (png_ptr == NULL || info_ptr == NULL ||
        (png_ptr->mode & PNG_WROTE_tIME))
        return;

    png_memcpy(&(info_ptr->mod_time), mod_time, png_sizeof(png_time));
    info_ptr->valid |= PNG_INFO_tIME;
}
    #endif

    #ifdef PNG_tRNS_SUPPORTED
void PNGAPI
png_set_tRNS(png_structp png_ptr, png_infop info_ptr,
             png_bytep trans_alpha, int num_trans, png_color_16p trans_color)
{
    png_debug1(1, "in %s storage function", "tRNS");

    if (png_ptr == NULL || info_ptr == NULL)
        return;

    if (trans_alpha != NULL)
    {
        /* It may not actually be necessary to set png_ptr->trans_alpha here;
         * we do it for backward compatibility with the way the png_handle_tRNS
         * function used to do the allocation.
         */

        png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0);

        /* Changed from num_trans to PNG_MAX_PALETTE_LENGTH in version 1.2.1 */
        png_ptr->trans_alpha = info_ptr->trans_alpha = (png_bytep)png_malloc(png_ptr,
                                                                             (png_size_t)PNG_MAX_PALETTE_LENGTH);
        if (num_trans > 0 && num_trans <= PNG_MAX_PALETTE_LENGTH)
            png_memcpy(info_ptr->trans_alpha, trans_alpha, (png_size_t)num_trans);
    }

    if (trans_color != NULL)
    {
        int sample_max = (1 << info_ptr->bit_depth);
        if ((info_ptr->color_type == PNG_COLOR_TYPE_GRAY &&
             (int)trans_color->gray > sample_max) ||
            (info_ptr->color_type == PNG_COLOR_TYPE_RGB &&
             ((int)trans_color->red > sample_max ||
              (int)trans_color->green > sample_max ||
              (int)trans_color->blue > sample_max)))
            png_warning(png_ptr,
                        "tRNS chunk has out-of-range samples for bit_depth");
        png_memcpy(&(info_ptr->trans_color), trans_color,
                   png_sizeof(png_color_16));
        if (num_trans == 0)
            num_trans = 1;
    }

    info_ptr->num_trans = (png_uint_16)num_trans;
    if (num_trans != 0)
    {
        info_ptr->valid |= PNG_INFO_tRNS;
        info_ptr->free_me |= PNG_FREE_TRNS;
    }
}
    #endif

    #ifdef PNG_sPLT_SUPPORTED
void PNGAPI
png_set_sPLT(png_structp png_ptr,
             png_infop info_ptr, png_sPLT_tp entries, int nentries)
/*
 *  entries        - array of png_sPLT_t structures
 *                   to be added to the list of palettes
 *                   in the info structure.
 *  nentries       - number of palette structures to be
 *                   added.
 */
{
    png_sPLT_tp np;
    int i;

    if (png_ptr == NULL || info_ptr == NULL)
        return;

    np = (png_sPLT_tp)png_malloc_warn(png_ptr,
                                      (info_ptr->splt_palettes_num + nentries) *
                                      (png_size_t)png_sizeof(png_sPLT_t));
    if (np == NULL)
    {
        png_warning(png_ptr, "No memory for sPLT palettes");
        return;
    }

    png_memcpy(np, info_ptr->splt_palettes,
               info_ptr->splt_palettes_num * png_sizeof(png_sPLT_t));
    png_free(png_ptr, info_ptr->splt_palettes);
    info_ptr->splt_palettes = NULL;

    for (i = 0; i < nentries; i++)
    {
        png_sPLT_tp to = np + info_ptr->splt_palettes_num + i;
        png_sPLT_tp from = entries + i;
        png_uint_32 length;

        length = png_strlen(from->name) + 1;
        to->name = (png_charp)png_malloc_warn(png_ptr, (png_size_t)length);
        if (to->name == NULL)
        {
            png_warning(png_ptr,
                        "Out of memory while processing sPLT chunk");
            continue;
        }
        png_memcpy(to->name, from->name, length);
        to->entries = (png_sPLT_entryp)png_malloc_warn(png_ptr,
                                                       (png_size_t)(from->nentries * png_sizeof(png_sPLT_entry)));
        if (to->entries == NULL)
        {
            png_warning(png_ptr,
                        "Out of memory while processing sPLT chunk");
            png_free(png_ptr, to->name);
            to->name = NULL;
            continue;
        }
        png_memcpy(to->entries, from->entries,
                   from->nentries * png_sizeof(png_sPLT_entry));
        to->nentries = from->nentries;
        to->depth = from->depth;
    }

    info_ptr->splt_palettes = np;
    info_ptr->splt_palettes_num += nentries;
    info_ptr->valid |= PNG_INFO_sPLT;
    info_ptr->free_me |= PNG_FREE_SPLT;
}
    #endif /* PNG_sPLT_SUPPORTED */

    #ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
void PNGAPI
png_set_unknown_chunks(png_structp png_ptr,
                       png_infop info_ptr, png_unknown_chunkp unknowns, int num_unknowns)
{
    png_unknown_chunkp np;
    int i;

    if (png_ptr == NULL || info_ptr == NULL || num_unknowns == 0)
        return;

    np = (png_unknown_chunkp)png_malloc_warn(png_ptr,
                                             (png_size_t)((info_ptr->unknown_chunks_num + num_unknowns) *
                                                          png_sizeof(png_unknown_chunk)));
    if (np == NULL)
    {
        png_warning(png_ptr,
                    "Out of memory while processing unknown chunk");
        return;
    }

    png_memcpy(np, info_ptr->unknown_chunks,
               info_ptr->unknown_chunks_num * png_sizeof(png_unknown_chunk));
    png_free(png_ptr, info_ptr->unknown_chunks);
    info_ptr->unknown_chunks = NULL;

    for (i = 0; i < num_unknowns; i++)
    {
        png_unknown_chunkp to = np + info_ptr->unknown_chunks_num + i;
        png_unknown_chunkp from = unknowns + i;

        png_memcpy((png_charp)to->name, (png_charp)from->name,
                   png_sizeof(from->name));
        to->name[png_sizeof(to->name) - 1] = '\0';
        to->size = from->size;
        /* Note our location in the read or write sequence */
        to->location = (png_byte)(png_ptr->mode & 0xff);

        if (from->size == 0)
            to->data = NULL;
        else
        {
            to->data = (png_bytep)png_malloc_warn(png_ptr,
                                                  (png_size_t)from->size);
            if (to->data == NULL)
            {
                png_warning(png_ptr,
                            "Out of memory while processing unknown chunk");
                to->size = 0;
            }
            else
                png_memcpy(to->data, from->data, from->size);
        }
    }

    info_ptr->unknown_chunks = np;
    info_ptr->unknown_chunks_num += num_unknowns;
    info_ptr->free_me |= PNG_FREE_UNKN;
}
void PNGAPI
png_set_unknown_chunk_location(png_structp png_ptr, png_infop info_ptr,
                               int chunk, int location)
{
    if (png_ptr != NULL && info_ptr != NULL && chunk >= 0 && chunk <
        (int)info_ptr->unknown_chunks_num)
        info_ptr->unknown_chunks[chunk].location = (png_byte)location;
}
    #endif


    #ifdef PNG_MNG_FEATURES_SUPPORTED
png_uint_32 PNGAPI
png_permit_mng_features(png_structp png_ptr, png_uint_32 mng_features)
{
    png_debug(1, "in png_permit_mng_features");

    if (png_ptr == NULL)
        return (png_uint_32)0;
    png_ptr->mng_features_permitted =
        (png_byte)(mng_features & PNG_ALL_MNG_FEATURES);
    return (png_uint_32)png_ptr->mng_features_permitted;
}
    #endif

    #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
void PNGAPI
png_set_keep_unknown_chunks(png_structp png_ptr, int keep, png_bytep
                            chunk_list, int num_chunks)
{
    png_bytep new_list, p;
    int i, old_num_chunks;
    if (png_ptr == NULL)
        return;
    if (num_chunks == 0)
    {
        if (keep == PNG_HANDLE_CHUNK_ALWAYS || keep == PNG_HANDLE_CHUNK_IF_SAFE)
            png_ptr->flags |= PNG_FLAG_KEEP_UNKNOWN_CHUNKS;
        else
            png_ptr->flags &= ~PNG_FLAG_KEEP_UNKNOWN_CHUNKS;

        if (keep == PNG_HANDLE_CHUNK_ALWAYS)
            png_ptr->flags |= PNG_FLAG_KEEP_UNSAFE_CHUNKS;
        else
            png_ptr->flags &= ~PNG_FLAG_KEEP_UNSAFE_CHUNKS;
        return;
    }
    if (chunk_list == NULL)
        return;
    old_num_chunks = png_ptr->num_chunk_list;
    new_list = (png_bytep)png_malloc(png_ptr,
                                     (png_size_t)
                                     (5 * (num_chunks + old_num_chunks)));
    if (png_ptr->chunk_list != NULL)
    {
        png_memcpy(new_list, png_ptr->chunk_list,
                   (png_size_t)(5 * old_num_chunks));
        png_free(png_ptr, png_ptr->chunk_list);
        png_ptr->chunk_list = NULL;
    }
    png_memcpy(new_list + 5 * old_num_chunks, chunk_list,
               (png_size_t)(5 * num_chunks));
    for (p = new_list + 5 * old_num_chunks + 4, i = 0; i < num_chunks; i++, p += 5)
        *p = (png_byte)keep;
    png_ptr->num_chunk_list = old_num_chunks + num_chunks;
    png_ptr->chunk_list = new_list;
    png_ptr->free_me |= PNG_FREE_LIST;
}
    #endif

    #ifdef PNG_READ_USER_CHUNKS_SUPPORTED
void PNGAPI
png_set_read_user_chunk_fn(png_structp png_ptr, png_voidp user_chunk_ptr,
                           png_user_chunk_ptr read_user_chunk_fn)
{
    png_debug(1, "in png_set_read_user_chunk_fn");

    if (png_ptr == NULL)
        return;

    png_ptr->read_user_chunk_fn = read_user_chunk_fn;
    png_ptr->user_chunk_ptr = user_chunk_ptr;
}
    #endif

    #ifdef PNG_INFO_IMAGE_SUPPORTED
void PNGAPI
png_set_rows(png_structp png_ptr, png_infop info_ptr, png_bytepp row_pointers)
{
    png_debug1(1, "in %s storage function", "rows");

    if (png_ptr == NULL || info_ptr == NULL)
        return;

    if (info_ptr->row_pointers && (info_ptr->row_pointers != row_pointers))
        png_free_data(png_ptr, info_ptr, PNG_FREE_ROWS, 0);
    info_ptr->row_pointers = row_pointers;
    if (row_pointers)
        info_ptr->valid |= PNG_INFO_IDAT;
}
    #endif

void PNGAPI
png_set_compression_buffer_size(png_structp png_ptr,
                                png_size_t size)
{
    if (png_ptr == NULL)
        return;
    png_free(png_ptr, png_ptr->zbuf);
    png_ptr->zbuf_size = size;
    png_ptr->zbuf = (png_bytep)png_malloc(png_ptr, size);
    png_ptr->zstream.next_out = png_ptr->zbuf;
    png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
}

void PNGAPI
png_set_invalid(png_structp png_ptr, png_infop info_ptr, int mask)
{
    if (png_ptr && info_ptr)
        info_ptr->valid &= ~mask;
}



    #ifdef PNG_SET_USER_LIMITS_SUPPORTED
/* This function was added to libpng 1.2.6 */
void PNGAPI
png_set_user_limits(png_structp png_ptr, png_uint_32 user_width_max,
                    png_uint_32 user_height_max)
{
    /* Images with dimensions larger than these limits will be
     * rejected by png_set_IHDR().  To accept any PNG datastream
     * regardless of dimensions, set both limits to 0x7ffffffL.
     */
    if (png_ptr == NULL)
        return;
    png_ptr->user_width_max = user_width_max;
    png_ptr->user_height_max = user_height_max;
}

/* This function was added to libpng 1.4.0 */
void PNGAPI
png_set_chunk_cache_max(png_structp png_ptr,
                        png_uint_32 user_chunk_cache_max)
{
    if (png_ptr)
        png_ptr->user_chunk_cache_max = user_chunk_cache_max;
}

/* This function was added to libpng 1.4.1 */
void PNGAPI
png_set_chunk_malloc_max(png_structp png_ptr,
                         png_alloc_size_t user_chunk_malloc_max)
{
    if (png_ptr)
        png_ptr->user_chunk_malloc_max =
            (png_size_t)user_chunk_malloc_max;
}
    #endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */


    #ifdef PNG_BENIGN_ERRORS_SUPPORTED
void PNGAPI
png_set_benign_errors(png_structp png_ptr, int allowed)
{
    png_debug(1, "in png_set_benign_errors");

    if (allowed)
        png_ptr->flags |= PNG_FLAG_BENIGN_ERRORS_WARN;
    else
        png_ptr->flags &= ~PNG_FLAG_BENIGN_ERRORS_WARN;
}
    #endif /* PNG_BENIGN_ERRORS_SUPPORTED */
#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */